I know this is a multi-faceted question. I have (bunches) some H4198 and a bunch of MBC 405 grain HCL bullets, I have mostly been loading the bullets for plinking level loads using Trail Boss at 900 to 1,000 FPS and light 1,200 FPS "hunting" loads. These MBC bullets are not gas checked. Using the various data, I see loads for 405 gr HCL bullets with 27 to 31 grains of the H4198. Looks to give about 1,400 FPS at 30 grains. I am shooting a Guide Gun so the actual velocity will probably be less.
The question comes back, am I on the threshold of needing gas checks with 30 grains of H4198, how fast can I send a HCL bullet of good size match to my rifle before I begin to see excessive leading? Any thoughts. I would rather ask now than clean Pb from my barrel later.
The question comes back, am I on the threshold of needing gas checks with 30 grains of H4198, how fast can I send a HCL bullet of good size match to my rifle before I begin to see excessive leading? Any thoughts. I would rather ask now than clean Pb from my barrel later.